Lathe-tool.



No. 686,134. Patented Nov. 5, [90L U. G. ROGERS.

LATHE TOOL.

Application filed Apr 11, 1901.)

(No Model.)

WWW,

=== ATTORNEY UNITED STATES PATENT OFFICE.

ULYSSES G. ROGERS, NEW YORK, Y,

LATHE-TOOL.

SPECIFICATION forming part of Letters Patent N 0. 686,134, datedNovember 5, 1901. Application filed April 11, 1901. Serial No. 55,339.No model.)

To all whom, it may concern.-

Be it known that I, ULYssEs G. ROGERS, a citizen of the United States ofAmerica, and a resident of New York city, county and State of New York,have invented certain new and useful Improvementsin Lathe-Tools, ofwhich labor" in shaping small circular. thumb-nuts and other sucharticles of the character commonly used in telegraph instruments, thesaid tool being constructed with radial side clearance of the difierentsalient parts, as hereinafter described, reference being made to theaccompanying drawings, in which Figure 1 is a diagram of the face of myimproved lathe-tool laid out flat. Fig. 2 is a top view of the tool andits holder with a piece of work in juxtaposition therewith, illustratingthe operation. Fig. 3 is a side elevation of the tool and holder.

In constructing the tool I first prepare a suitable disk at, of steel,having a central bore for securing it to a holding-stock b by a bolt 0and nut d, and notch the same radially, as at e, for prod ucing thecutting edges. On the face of this disk I produce the groove fintermediate of two plain rim-faces g and h, with the radially-largerplain rim-facet next to h, and lastly the larger flange j, the face ofsaid flange being beveled expandingly away from rim-face t'. In Fig. 2it will be seen that the fiangej and rims t' and g are slightly undercutradially for radial clearance, and in Fig. 1 it is also to be seen thatthese elements taper slightly from the leading side of the notch e tothe following side for circumferential clearance ofthe sides. By thisconstruction of the tool there is produced a grooved cutting edgeZ forshaping the large rim m of the nut, two plain cutters 'n 0 for producingthe plain faces 19 q of the nut on opposite sides of the rim m,respectively, and of smaller diameter than said rim, another plaincutter q for producing the plain. face soutside of face q, and thecuttingolf cutter t for separating the finished nut.

It is to be noted that the bevel-cutter t is in such relation to therestthat it reduces the metal cut away in separating the nuts in taperform and separates the nuts at the points of the tapers in a way toeflect the separation smoothly close to the nuts, while the rest of theportion being cut away is of larger and firmer resisting capacity. Thedotted point a in Fig. 2 indicates What is meant by the taper form ofthe metal cut away in separating the nut, whereby the separation takesplace in the plane of the side of the nut, which makes clearer cuts thanif the face of cutter 25 were parallel to the axis of the disk. Theseparation of the partu follows directly after the nut is separated.

The cutting edges are sharpened by grinding the face of the notch e,whereon the several cutting edges are produced.

The contour of the face of the disk cutter may of course be modified, asit may be desired to modify the faces of the nuts or other articles.

What I claim as my invention is- In a radially-notched disk lathe-toolhaw ing a plurality of circumferential rim or flange cutters, thesalient parts of said cutters, having besides the usual circumferentialclearance extending from point to heel of each, radial undercut orrentering side clearances.

Signed at New York city this 9th day of April, 1901.

ULYSSES G. ROGERS.

Witnesses:

C. SEDGWICK, A. P. THAYER.

